The Nikon 2X Teleconverter TC-201 is designed for manual focus Nikon cameras with an F/Ai-mount. It is specifically compatible with Nikon cameras and lenses, offering a maximum aperture of f/1. The teleconverter has a fixed focal length and belongs to the Nikon Ai series, making it suitable for photographers looking to extend their lens's reach for distant subjects. With manual focus capabilities, this teleconverter provides precise control over focus, ideal for capturing detailed images with a shallow depth of field.